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Finding the Fourth Proportional to 20,603.30, 30,914.55 and 15,419.30

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Solution

The fourth proportional to 20,603.30, 30,914.55 and 15,419.30 is: 23,136.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.30 : 30,914.55 = 15,419.30 : x
  2. Step 2: Convert to fraction form
    20,603.30/30,914.55 = 15,419.30/x
  3. Step 3: Cross multiply
    20,603.30x = 30,914.55 × 15,419.30
  4. Step 4: Simplify right side
    20,603.30x = 476,680,720.82
  5. Step 5: Solve for x
    x = 476,680,720.82/20,603.30
  6. Step 6: Final answer
    x = 23,136.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.